Forget volumes that have been freshly formatted.

When the user formats an existing volume, the old partition will never
appear again, so we can immediately clean up any VolumeRecord
information.

This change ensures that the next MediaProvider idle maintenance pass
will see the UUID has been removed via getRecentStorageVolumes(),
and will clean up stale metadata, instead of waiting an entire week
for the volume to appear stale.

Bug: 157164840
Test: atest --test-mapping packages/providers/MediaProvider
Change-Id: Ia60440a423d980de141a87e957cfe03f91a6d9ff